| 초록 |
Herein, we incorporated cobalt-iron layered double hydroxide with metal-organic framework derived cobalt phosphide via electrodeposition on carbon cloth. The synthesized CoP@CoFe hierarchical heterostructures exhibited not only possessing high surface area due to the MOF nature, also showed OER, and HER responsive without using any binder on carbon cloth substrate. The prepared electrode was applied to overall water splitting in 1 M KOH, and the overpotentials to reach current density of 10 mA cm-2 were 270, 172 mV, respectively. The CoP@CoFe hierarchical heterostructures show excellent electrocatalytic activities toward both OER and HER in an alkaline media, attributed to the synergistic effect such as reduced series resistance and increased catalytic active site. Moreover, the catalytic activity was not degraded even after a long operation of more than 50 h. |
